What Is A Rational Algebraic Expression?

What Is A Rational Algebraic Expression? If f is a rational expression then f can be written in the form p/q where p and q are polynomials. What is the example of rational algebraic expression? Examples of rational numbers are 5/7, 4/9/ 1/ 2, 0/3, 0/6 etc. On the other hand, a rational expression is